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No. 6I|,896. Patented Uct. 4, |898.

J. B. noBYNE.

SEWING MACHINE.

(Application led Huy 15, 1895.) (No Model.) 5 Sheets-Sheet I.

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(No Model.) 5 Sheets-Sheet 2.

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5%/ @udm Tn: Nonms PETER; co. Fumo-umn., WASHINGTON. Dl a Patented t. 4, |898.

J. B. DUBYNLU SEWING MACHINE.

(Application led Hay 16, 1895.)

5 Sheets-Sheet 3.

(N0 Model.)

No. 6||,896. Patented Oct. 4, |898.

J. B. 'DUBYNL SEWING MACHINE. (Application filed May 15. 1895.)

5 Shams-Sheet 4.

(No Model.)

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J. B. DBYNE.

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(Arfpcabion filed May 15, 1895.)

5 Sheets-Sheet 5.

(N0 Model.)

Nirnn STATES 'PATENT einen..

Y JAMES B. DOBYNE, OF ST. LOUIS, MISSOURI, ASSIGNOR TO THE LANDIS WAX THREAD SEVING MACHINE COMPANY, OF SAME PLACE.

SEWING-MACHINE.

SPECIFICATION forming part of Letters Patent No. 611,896, dated October 4, 1898.

- Application filed May 15. 1895. Serial No. 549,371. (No model.)

T0 @ZZ whom it may concern:

Beit known that I, JAMES B. DOBYNE, a citizen of the United States, residing at St. Louis, in the State of Missouri, have invented certain new and useful Improvements in Sewing-Machines; and I do hereby declare the following to be afull, clear, and exact description of the invention, vsuch as willenable others skilled in the art to which it appertains to make and use the same. A V

This invention relates to the general construction, arrangement, and operation of the feed-lever,`the diiferent parts comprising the working head of the machine, and the mechanism and connections for actuating such parts, as will be hereinafter set forth.

In the drawings, Figure l is a front elevation of a machine embodying my improved features; Fig. 2, a rear elevation; Fig. 3,'a front end elevation of the head of the machine; Fig. 4., a broken-away part elevation and part section on line 4, Fig. 5, looking in the direction indicated by the arrow; Fig. 5, a plan section on line 5, Fig. 4.; Fig. 6, a broken-away detail of the upper end of a needle-guide bar, showing the spring for returning the same to its normal position; Fig.A 7, a plan section on line 7, Fig. 4, showing the structure of the needle-guide in detail; Fig. 8, a sectional elevation on line 8; Fig. 9, a sectional end elevation on line 9, Fig. 5; Fig. l0, a broken-away plan of the head end of the machine; and Fig. l1, a broken-away part elevation and part section of the rear end4 of the machine, looking from the back side, showing in detail the means for raising this end of the presser-foot lever.

A is the supporting-base; A', the stationary overhanging arm; A2, the needle-lever; A3, the needle-bar; A4, the needle; A5, the combined needle-cam and iiy-wheel, and B the driving-shaft.

The forked or bifurcated feed-lever C is located at the back side of the machine and is adapted to have a vibratory action in a horizontal plane on pivot-bolts ce c, adjustably inserted in lugs a a', formed on the machine.

The back end of the lower feed-dog a2, Figs. 3 and 9, is connected to the lower fork end or member c3 of the feed-lever by means of a pin a4, loosely inserted therein. This feeddog is provided witha raised part a5, extending above the surface of the work-plate as, which is provided. with the opening af and is `rigidly fastened to the top of the base.

On the upper front fork end or member as vof the feed-lever is mounted a link or rigid 'arm O,j extending downwardly therefrom,

Figs. 3, 5, and 9, and is provided with a slot The presserfoot bar C2 is provided on the lower end with a rear extension or lug l), stopping on a line with slot a9. A bolt b is loosely inserted in the slot in link C and passes through the lug extension b of the bar O2. This provides for, the slight lateral or vibratory movement of the presser-foot bar coincident with that of the feed-lever, and the slot feature allows for the vertical movement in accordance with the thickness of the Work.

The upper end of the presser-foot bar terminates in the lateral extension b2 and is provided on its inner edge below this point with a lug h3, connected to a presser-foot guide-bar O3, Fig. 9, by a pivot-pin b4, on which the presser-foot bar has a slight rocking action in its working movement. The guide-bar O3 is cut away on the side adjacent to the presserfoot bar and below its pivotal connection therewith, so as to provide a space b5.

A guide-rib b, Figs. 8 and 9, is rigidly inserted in the head end of the overhan ging arm betweenthe presser-foot bar and the guidebar in space b5, and which assists in retaining these parts in their proper relative position and holds the guide-bar in a true vertical po` sition in its guideway.

The presser-foot or upper feed-dog C4 is removably retained in its bar by a set-screw b".

The guide-bar C3 is square in cross-section and extends above the head of the machine, the upper end beingretained in position by a guide-bracket 198, bolted to the top of the overhanging arm. Alifting-dog D, having a square aperture in the front end thereof to correspond to and fit the guide-bar, is loosely mounted thereon. The rear end of the lifting-dog rests loosely on a friction-,roller cl, journaled in the front end of a vibrating lifting-lever D'. This lever is provided with a pivotal bearing d', Fig. 2, and runs downwardly from this point to the main driving- ICO will follow the movement of the needle.

shaft and has a friction-roller d3, Fig..1l, j ournaled in` the rear end thereof. The drivingshaft is provided at this point with a cam projection CZ", that comes in contact with roller cl3 once in each revolution, depressing this end of lever D and raising the opposite end, which in turn raises the end of the liftingdog D resting thereon. Raising this end of the dog at an angle from its horizontal position causes the opposite end with its square aperture to clamp and raise the guide-bar C3, which carries the presser-foot bar with it. lVhen the cam projection has passed outof contact with the lever D', the spring d5, coiled on the guide-bar and bearing on the dog D, forces the same downwardly to its normal position, and with it this end of lever D', and throws the opposite end back in the pathway ofthe cam to receive the contact thereof for the next movement. The guide-bar and presserfoot bar are returned downward by a iiat spring d6, the rear end of which is bolted on top of the overhanging arm, as at 0V, Fig. 2, and the front depressing end bearing on the extension h2 of the presser-foot bar. A stop de, Fig. 8, is located just under the front end of the guide-bar dog D and is adjustable with reference thereto by a set-screw di). On the down movement the contact of the dog with this stop causes it to release its grip on the guide-bar at the proper time.

A needle-guide bar E is located just in advance of the needle-bar A4 and is adapted to have a vertical movement, so that the guide This needle-guide bar has an arm g mounted on the upper end thereof, which extends across the upper end of and in the pathway of the needle-bar. On the lower end of the guidebar E is mounted a needle-guide foot F, provided with a split g', Figs. 3, 4, and 7, for the removable insertion of a sleeve or bushing g2, through which the needle plays.

The screw g3 provides for the adjustment of the split end in changing sleeves of different sizes in accordance with needles of different diameters.

An up movement is imparted to the needleguide bar by the upper end of the needle-bar coming in contact with the arm g and the down movement by a spring g4, one end of which rests in a lug g5, Figs. t and 6, formed on the arm g, the opposite tension end being secured on the overhanging arm, as at g. This' arrangement provides a close-fitting needle-guide and causes the same to follow the movement of the needle, and thereby greatly lessening the liability of the needle to bend or break.

A rubber buffer Q7, Figs. G and 9, is inserted in the under side of arm g and lessens the contact shock of the needle-bar.

The downward movement of the needleguide baris arrested by a stud h, Fig. 9, proj ecting from the presser-foot guide-bar C3, the lug g5 of the arm g coming in contact therewith and resting thereon until the needle-bar returns on the up movement. This prevents the needle-guide-bar from descending too far; otherwise the guide would come in contact with the presser-foot.

Having thus described my invention, what I claim as new, and desire to secu re by Letters Patent, is-

l. In a sewing-machine, the combination with a forked feed-lever, having a vibratory action in a horizontal plane, of a lower feeddog, secured to the lower member of said lever and a presser-foot bar, carrying the upper feed-dog or presser-foot and secured to the upper member of said lever, whereby a positive movement is imparted to said feed devices simultaneously, substantially as described.

2. In a sewing-machine, thel combination with a feed-lever, and means forv actuatingT the same, of a slotted link, mounted on the upper front end of said lever, a presser-foot bar, having a movable connection with said slotted link, a guide-bar, to which the presserfoot bar is pivoted, and means for imparting a vertical movement to said presser-foot bar and guide-bar simultaneously, substantially as described.

3. In a sewing-machine, the combination with a presser-foot bar, of a guide-bar, to

' which the presser-foot bar is pivoted, a lifting-dog, loosely mounted on the upper end of the guide-bar, a vibrating lifting-lever, the front end whereof has frictional contact with said lifting-dog, the driving-shaft, provided with a cam projection adapted to have an intermittent contact with and depress the rear end of said lever, and a spring, imparting a downward movement to said presser-foot bar andI guide-bar when the lifting pressure of the said vibrating lever is relaxed, substantially as described.

et. In asewing-niachine, a forked feed-lever and means foryvibrating the same horizontally, the feed-dog connected to the lower member of said lever, and the presser-foot having linked connection to the upper member of said lever, and means for lifting said presser-foot, all combined substantially as described.

5. In a sewing-machine, the combination with a forked feed-lever, and means for vibrating the same in a horizontal plane, of a feeddog, attached to the lower member thereof, a`

slotted link, mounted on the upper member, a presser-foot bar, connecting at its lower end with said link, a guide-bar to which said presser-foot bar is pivoted, a spring-pressed lifting-dog, loosely mounted on said guidebar, a vibrating lifting-lever, the front end of which has frictional contact with theunder side and rear end of said lifting-dog, the drivin g-shaft, provided with a cam projection adapted to have an intermittent contact with and depress the rear end of said lever, and a spring, bearing on and imparting a downward movement to the presser-foot bar, substantially as described.

IOO

IIO

6. In a sewing-machine, the presser-foot above the work-table and means for reciprocating the same vertically, the feed-dog below the work-table and means for reciprocating the same horizontally, and mechanism substantially as described connecting the feeddog and presser-foot, and serving to actuate said presser-foot in horizontal direction, all

path of movement of the needle-bar, and the needle-guide foot at the lower end of said needle-guide bar, having adjustable sleeve through which the needle plays, all combined substantially as described.

9.' In a sewing-machine, the vertically-reciprocating needle-bar, the vertically-movable needle-guide bar actuated in one direction by the needle-bar and in the other by a spring, and supporting the needle as described, and the presser-foot guide having a stop for the needle-guide bar, all combined with suitable driving mechanism, substantially as described.

In testimony whereof I affix my signature in presence of two witnesses.

JAMES B. DOBYNE.

Witnesses:

L. M. FREEMAN, L. B. COUPLAND. 

